A206508 - OEIS

%I #5 Mar 31 2012 12:37:11

%S 19797,1020756,41873838,1483188648,47830788954,1444445274765,

%T 41561685861258,1152430341911256,31037137973162439,816543046767301710,

%U 21075169065968338644,535422905459574902352,13424260728041018703732

%N Number of (n+1)X5 0..2 arrays with the number of clockwise edge increases in 2X2 subblocks nondecreasing rightwards and downwards

%C Column 4 of A206512

%H R. H. Hardin, <a href="/A206508/b206508.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

%e ..2..1..2..1..0....2..2..0..0..1....2..1..2..2..2....1..0..2..0..1

%e ..1..2..1..2..1....1..2..0..1..2....2..1..1..1..1....2..0..1..0..2

%e ..1..0..2..0..2....1..2..2..0..0....0..0..0..0..1....2..1..2..1..0

%e ..2..1..0..1..0....0..1..0..2..1....1..1..0..2..1....0..2..0..2..1

%e ..0..2..1..2..1....1..2..1..0..2....2..1..1..1..0....1..0..1..0..2

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 08 2012